Question about 1991 Oldsmobile Cutlass Ciera
91 cutlass v6 4spd OD transmission just had pan off service no damage found oil good no burnt smell filter ok. Heavy braking to a stop, like using a left turn lane, transmission acts like it looses pressure, goes into neutral for 5 to 10 seconds and then picks up in 1st gear. If I keep RPMs up a little, it will shift down through the gears and stay engaged. Happens mostly when driving in OD. Works fine in all other circumstances. No code or trouble light indicator. 83K miles
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Posted on Jan 02, 2017
take it by autozone and let them decode the computer and they can tell you what the codes are. That will at least be a starting point.
Posted on May 06, 2009
SOURCE: Hard down shifts
Check the transmission fluid level, see if there is any foaming in the fluid which is bad, and condition, If the fluid is low the transmission fluid pressure could be low and if the transmission fluid filter is dirty, that could also be restricted the fluid flow.
The transmission fluid should be bright red like strawberry in colour, if it's dark like burgundy then it's time to change the transmission oil and filter. The hard down shifting could be a servo that is sticking caused by dirt in the fluid, have a Transmission shop service the transmission and scan the car's ECM for any codes that may be causing your shifting problem.
Good luck and hope this helps.
Posted on May 26, 2009
There is a vaccum modulator on the front of the transmission. It has a single vaccum line going to it and is held in place with one bolt. This part controls your up and down shift. Its a 20.00 part. Try replacing it first. If that dosent do it then you will need a rebuild or replacment.
Posted on Mar 11, 2010
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